ISTANBUL Simplicity is sometimes the key to great food. Especially so in summer when all the vegetables and fruits are at their peak. A sun-kissed tomato can be more than enough for a fantastic pasta sauce, or it is pure perfection on its own with a sprinkle of sea salt and a drizzle of good olive oil. This is especially true for Mediterranean food when the summer heat rises, and one tends to opt for simpler, straight forward, no-fuss recipes. Afterall, every single ingredient in the summer